Original 1st printing 17&1/2 x 22&1/2" concert poster for Country Joe & the Fish appearing with Shocking Blue, Pacific Gas & Electric, the Amboy Dukes (featuring Ted Nugent) and Ambergris at the Aragon Ballroom in Chicago, IL from 6/12-13/1970.
Art by Laura Green, the image is featured in the Art of Rock book on page 399 (plate 4.208).
Medium flat index stock poster is in good to very good (B to B/B+) condition; there are a series of semi-soft horizontal roll creases and tiny thin vertical stress bends covering most of the image area/borders, along with a few tiny edge dings, a few stray pin-prick stains and tiny smudges here and there, otherwise fine.
An overall superb-looking example of a somewhat uncommon low-run regional Midwest concert poster from the Aragon.